GB
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Protection and corrosion resistance:
All the actuators are supplied with corrosion protection
for normal environments. For corrosion resistance of the
different types of protection see technical data sheet.
Before installing the actuator in aggressive environment,
ensure that the selected protection level is suitable.
•
Actuator designation and marking (see technical data
sheets):
The actuator type, size, operating pressure, output
torque, direction of rotation, spring action, operating
temperature and type of connections/interfaces are
determined by designation.
•
All AIR TORQUE actuators are supplied with an identifi-
cation label showing the serial number and all necessary
information on use, service, operation and product
designation. Where applicable, the label indicates the
classification according to ATEX Directive 2014/34/EU.
4) OPERATING FUNCTION AND DIRECTION OF
ROTATION
The actuator is a pneumatic device for remote operation of
industrial valves. The operation (90°,120°,135° or 180° ro-
tation) may be activated by different methods:
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Direct mounting of solenoid valve (5/2 for double acting, 3/2
for spring return) to pressure connections 2 and 4, con-
nected to supply and control lines.
•
Screwed connection (to pressure connections 2 and 4)
with air lines from separate control cabinet. The standard
rotation (when port 4 is pressurized or for spring action) is
clockwise to close. When port 2 is pressurized, counter-
clockwise rotation is obtained. Air Torque actuators can
be supplied with different types of assembly/rotation di-
rection depending on the type of required operation
and/or installation, see technical data sheets.
DOUBLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE "ST") TOP VIEW
Air supplied to port 2 forces the pistons towards the actuator end caps.
A counter-clockwise rotation is achieved.
Exhaust air exits from Port 4.
Air supplied to Port 4 forces the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
4
SINGLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE "ST") TOP VIEW
Air supplied to Port "2" forces the pistons toward the actuator end caps,
compressing the springs.
A counter-clockwise rotation is achieved. Exhaust air exits from Port 4.
The loss of air pressure (air or electric failure) at Port "2" allows the springs
to force the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
5) ACTUATOR INSTALLATION INSTRUCTIONS
The Air Torque actuator is a pneumatic device for the remote
operation of industrial valves. The actuator will operate through
90°,120°,135° and 180° rotation permitting the opening and
closing of many types of valves up to 180° rotation.
All the necessary technical information to install the actuator
correctly and safely onto a valve i.e.:
Dimensions, Output torque, Supply pressure, Air volume,
Stroke adjustment, Operating time, Operating temperature,
Direction of rotation and Weight is stated clearly on the
Actuator label, in the catalogue and technical data sheets.
Please read all technical information before proceeding with
the actuator installation.
5.1) Important safety notice!
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For safety reasons, the actuator must not be pressurized
at any time during installation as injury may result.
•
The utmost cleanliness is required during air supply
connection to the actuator i.e. the connecting pipe
thread, fittings and seals must be clean and dirt-free.
•
When fitting accessories onto the actuators, assemble
them in such a way that the emergency control of the
solenoid valve and the top of the drive shaft are easily
accessible, should emergency manual operations be required.
•
Before fitting onto the valve, make sure that the actuator/
valve are correctly orientated, depending upon which
direction of rotation is required.
•
For spring return actuators, avoid that dangerous and/or
corrosive substances in the working environment enter
into the external chambers by using adequate filters
and/or solenoid valves.
IMAT 4thGU-E
